package com.account.interceptor;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by GPL on 2017/8/9.
 */
public class TokenInterceptor implements HandlerInterceptor {
    private static final Logger logger = LoggerFactory.getLogger(TokenInterceptor.class);

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {

        logger.info("Token拦截器...开始");
        // 只有返回true才会继续向下执行，返回false取消当前请求
        logger.info("Token拦截器...结束");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) throws Exception {
        // 请求处理之后进行调用，但是在视图被渲染之前（Controller方法调用之后）
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        // 在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）
    }


}
